Did anyone get this achievement lately? I did not.
My primary color is yellow and my secondary color is dark green. I played a lot vs yellow guys who were forced to use their secondary color. And yet I do not have the achievement.
I think Fizzer broke some code in February with the Update 3.5.https://www.warlight.net/blog/index.php/2015/02/update-3-5-coin-leaderboard-alternate-colors/
I bet no one got the color superiority achievement since February.
If you have registered after the update 3.5 please check your achievements.
If your primiry color is yellow please invite me in a game. Some one will have to use a secondary color. Niether of us will get the achievement and we will report it to Fizzer.